EP0361212A2 - Circuit de protection pour un transistor de commutation - Google Patents

Circuit de protection pour un transistor de commutation Download PDF

Info

Publication number: EP0361212A2
Authority: EP; European Patent Office
Prior art keywords: switching transistor; emitter; collector; circuit; switch
Prior art date: 1988-09-28
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP89116977A

Other languages

German (de)

English (en)

Other versions

EP0361212A3 (en

EP0361212B1 (fr

Inventor

Harald Dipl.-Ing. Hügel

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Siemens AG

Original Assignee

Siemens AG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1988-09-28

Filing date

1989-09-13

Publication date

1990-04-04

1989-09-13 Application filed by Siemens AG filed Critical Siemens AG

1989-09-13 Priority to AT89116977T priority Critical patent/ATE98826T1/de

1990-04-04 Publication of EP0361212A2 publication Critical patent/EP0361212A2/fr

1990-09-26 Publication of EP0361212A3 publication Critical patent/EP0361212A3/de

1993-12-15 Application granted granted Critical

1993-12-15 Publication of EP0361212B1 publication Critical patent/EP0361212B1/fr

2009-09-13 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0826—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches

Definitions

the invention relates to a protective circuit for a switching transistor with a switch-off device for a control signal of the switching transistor, the switch-off device being controlled by a collector-emitter monitoring system monitoring the switching transistor.
a protective circuit for a switching transistor with a switch-off device for control pulses of the switching transistor is known, the switch-off device being controlled by a comparator which compares a voltage at the switching transistor with a reference voltage and switches off the drive pulses when the switching transistor is overloaded.
the switching transistor is monitored for desaturation, i.e. it is checked whether a collector-emitter voltage exceeds the value which occurs when the transistor is saturated. The switching transistor can thus be protected against short circuit and overload.
the voltage applied to the collector-emitter path of the switching transistor is compared in a comparator with a reference voltage corresponding to the saturation value, and the drive pulses are switched off when the collector-emitter voltage of the switching transistor exceeds the saturation value.
a circuit arrangement with a short-circuit-proof output wherein a diode circuit forming the current limiting stage of the output transistor is electrically connected in parallel to the series circuit of the base-emitter path of the output transistor and its emitter resistor.
the diode circuit comprises a zener diode and the emitter-base path of a transistor. This transistor controls a monostable multivibrator. As soon as a short circuit occurs in the load, the current flowing over the emitter-collector path of the output transistor and the voltage drop of the emitter-base path of the output transistor increase.
the diode circuit When the threshold value set by the zener diode is exceeded, the diode circuit becomes conductive, the monostable multivibrator is controlled in its quasi-stable state and the output transistor is switched into its blocking state. The diode circuit remains conductive until the monostable multivibrator has flipped back into its stable state. With this circuit arrangement, one can only limit the current of the output transistor in the event of a short circuit. In addition, due to the comparative means, the protective circuit only responds after a response delay.
the invention is based on the object of designing a protective circuit of the type mentioned at the outset without a response delay, the switching transistor also being protected when switching to an existing short circuit.
a timing element is arranged on the input side, at the input of which the drive signal is present, that a series circuit comprising a zener diode and a switch is electrically connected in parallel to the base-emitter path of the switching transistor and that the output of the timing element on the one hand with a control output the collector-emitter monitoring and on the other hand is linked to the switch.
the base-emitter path of the switching transistor is provided with a Zener diode which can be switched off, the switch-off taking place after a predetermined delay time at the earliest, the switching transistor is also protected when a short circuit is present.
the delay time depends on the switching transistor used, since the delay time indicates the time span in which the collector-emitter voltage reaches the low static value from the time of switching on. Only when the switching transistor has reached this operating point is the collector-emitter monitoring activated and the Zener diode switched off from the base-emitter path of the switching transistor.
the switch switches to its rest position, i.e. the switch is closed and the collector-emitter monitoring is no longer activated.
the base current and thereby the collector current or an existing short-circuit current are limited by the Zener diode during the delay time.
the timer only opens the switch after the delay time has elapsed after the collector-emitter monitoring has been activated. This ensures that the switching transistor is protected even when it is connected to an existing short circuit.
a switching transistor 2 is connected on the collector side to a supply voltage source + U V.
This switching transistor 2 can be one of the two switching transistors of a bridge arm of a converter, the emitter E being connected to a collector of the switching transistor connected downstream, which is not shown for reasons of clarity.
a voltage of an intermediate circuit can also be provided as the supply voltage + U V. If the switching transistor 2 is one of, for example, six switching transistors of a converter, a load, which is not shown for reasons of clarity, can be connected to the collector C or to the emitter E of the switching transistor 2.
the collector C of the switching transistor 2 is linked to a collector-emitter monitoring 6 via a decoupling diode 4, the anode of the decoupling diode 4 being connected to a supply voltage + U B via a resistor 8.
the base B of the switching transistor 2 is supplied with control pulses U BL via a symbolically illustrated switch-off device 10, with which switch-on pulses for the switching transistor 2 can be interrupted or short-circuited in the event of a fault.
This shutdown device 10 is controlled by the collector-emitter monitoring 6.
the control signal U BL is fed to a protective circuit 12.
This protection circuit 12 contains a timing element 14, a Zener diode 16 and an off switch 18. The timing element 14 is connected downstream of an input 20 of this protection circuit 12.
a timer 14 can In the simplest case, a monoflop and a plurality of diodes electrically connected in series can also be provided as the Zener diode 16.
the output of this timer 14 is linked on the one hand via a control output 22 to the collector-emitter monitoring 6 and on the other hand to the switch 18.
This switch 18 and the Zener diode 16 are electrically connected in series, this series connection being electrically connected in parallel to the base-emitter path of the switching transistor 2.
the switch 18 is designed so that when no control signal U BL is present, the switch 18 is in its rest position, ie the switch 18 is closed.
a comparator can be provided as collector-emitter monitoring 6, which compares the collector-emitter voltage U CE of the switching transistor 2 with a reference voltage, a signal being present at the output as soon as this collector-emitter voltage U CE of the Switching transistor 2 is greater than this reference voltage.
FIG. 2 shows the control signal U BL in a diagram over the time t.
3 shows the circuit diagram of the switch 18, this circuit diagram being shown in a diagram over the time t.
FIG. 4 also shows the output signal U BLZ of the timing element 14, this output signal U BLZ being shown in a diagram over the time t.
the control signal U BL is present at the base B of the switching transistor 2 and at the input 20 of the protective circuit 12.
no output signal U BLZ appears at the output of the timing element 14, as a result of which the switch 18 remains in its rest position, ie it is closed.
the base-emitter path of the switching transistor 2 is bridged by the series connection of the Zener diode 16 and the switch 18.
the switching transistor 2 is driven by the control signal U BL , as a result of which a collector current flows. Is the Switching transistor 2 has been switched to an existing short circuit, the collector current is limited by means of the Zener diode 16.
an output signal U BLZ appears at the output of the timer 14, whereby the collector-emitter monitoring 6 is activated and the switch 18 is opened.
the time difference t2 - t1 is such that the collector-emitter voltage U CE has dropped to its low static value after switching on. This time difference depends on the switching transistor 2 used, this time span being of the order of 15 to 30 microseconds. lies.
the switch 18 After the time difference t2 - t1 on the one hand the switch 18 is kept in the off state and on the other hand the collector-emitter monitoring 6 is kept active as long as the control signal U BL is in the high state at the base of the switching transistor 2 and at the input 20 of the protective circuit 12 located.
the level of the control signal U BL goes from the high state to the low state, the signal U BLZ also changing to the low state at the output of the timing element 14. Because the signal U BLZ is no longer present at the output of the timing element 14, the switch 18 jumps back to its rest position, ie the Zener diode 16 is again connected in parallel to the base-emitter path of the switching transistor 2.
the switching transistor 2 is thus protected by the Zener diode 16 outside the activation time of the collector-emitter monitoring 6.
the base-emitter voltage U BE of this switching transistor 2 is limited by this Zener diode 16, as a result of which the drive current flows from the base into the Zener diode 16 in the event of a short circuit as soon as the base-emitter voltage U BE reaches the value of the Zener Tension has reached.
the switching transistor 2 is driven weakly in the event of a short circuit, as a result of which the short circuit current or the collector current is limited.
Zener diode 16 Since the Zener diode 16 is switched off as soon as the collector-emitter voltage U CE of the controlled switching transistor 2 has reached its nominal value, no part of the base current can flow away via the Zener diode 16. This enhances the natural reinforcement of the Switching transistor 2 is not reduced. At the nominal operating point, the switching transistor 2 is protected against overload by means of the collector-emitter monitoring 6.

Landscapes

Electronic Switches (AREA)
Power Conversion In General (AREA)
Dc-Dc Converters (AREA)

EP89116977A 1988-09-28 1989-09-13 Circuit de protection pour un transistor de commutation Expired - Lifetime EP0361212B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT89116977T ATE98826T1 (de)	1988-09-28	1989-09-13	Schutzschaltung fuer einen schalttransistor.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3832918		1988-09-28
DE3832918		1988-09-28

Publications (3)

Publication Number	Publication Date
EP0361212A2 true EP0361212A2 (fr)	1990-04-04
EP0361212A3 EP0361212A3 (en)	1990-09-26
EP0361212B1 EP0361212B1 (fr)	1993-12-15

Family

ID=6363888

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP89116977A Expired - Lifetime EP0361212B1 (fr)	1988-09-28	1989-09-13	Circuit de protection pour un transistor de commutation

Country Status (3)

Country	Link
EP (1)	EP0361212B1 (fr)
AT (1)	ATE98826T1 (fr)
DE (1)	DE58906431D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US9093836B2 (en)	2011-02-07	2015-07-28	Infineon Technologies Austria Ag	Method for controlling a transistor and control circuit
CN105359413A (zh) *	2013-07-05	2016-02-24	恩德莱斯和豪瑟尔两合公司	用于保护两线电流环路的至少一个部件的电路布置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN112098739B (zh) *	2020-05-27	2024-02-23	深圳天邦达科技有限公司	电池包短路保护测试电路、电路板和测试设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2555509A1 (de) *	1975-12-10	1977-06-16	Vdo Schindling	Schaltungsanordnung mit einem kurzschlussfesten ausgang
EP0095579A1 (fr) *	1982-05-05	1983-12-07	Siemens Aktiengesellschaft	Circuit de protection pour un transistor de commutation
DE3504200A1 (de) *	1985-02-07	1986-08-07	Siemens AG, 1000 Berlin und 8000 München	Kurzschlussueberwachung fuer schaltregler

1989
- 1989-09-13 AT AT89116977T patent/ATE98826T1/de not_active IP Right Cessation
- 1989-09-13 DE DE89116977T patent/DE58906431D1/de not_active Expired - Fee Related
- 1989-09-13 EP EP89116977A patent/EP0361212B1/fr not_active Expired - Lifetime

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2555509A1 (de) *	1975-12-10	1977-06-16	Vdo Schindling	Schaltungsanordnung mit einem kurzschlussfesten ausgang
EP0095579A1 (fr) *	1982-05-05	1983-12-07	Siemens Aktiengesellschaft	Circuit de protection pour un transistor de commutation
DE3504200A1 (de) *	1985-02-07	1986-08-07	Siemens AG, 1000 Berlin und 8000 München	Kurzschlussueberwachung fuer schaltregler

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ELEKTRONIK *
ELEKTRONIK Heft 15, 1980, Seiten 45-49, DE; K.Rischmueller: "Pulsgesteuerte Treiberstufen für Brückenschaltungen" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US9093836B2 (en)	2011-02-07	2015-07-28	Infineon Technologies Austria Ag	Method for controlling a transistor and control circuit
CN105359413A (zh) *	2013-07-05	2016-02-24	恩德莱斯和豪瑟尔两合公司	用于保护两线电流环路的至少一个部件的电路布置
CN105359413B (zh) *	2013-07-05	2018-08-24	恩德莱斯和豪瑟尔欧洲两合公司	用于保护两线电流环路的至少一个部件的电路装置

Also Published As

Publication number	Publication date
EP0361212A3 (en)	1990-09-26
EP0361212B1 (fr)	1993-12-15
DE58906431D1 (de)	1994-01-27
ATE98826T1 (de)	1994-01-15

Legal Events

Date	Code	Title	Description
1990-02-17	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1990-04-04	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): AT CH DE FR GB IT LI SE
1990-08-08	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1990-09-26	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): AT CH DE FR GB IT LI SE
1990-12-05	17P	Request for examination filed	Effective date: 19901009
1992-11-04	17Q	First examination report despatched	Effective date: 19920917
1993-10-29	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1993-12-15	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): AT CH DE FR GB IT LI SE
1993-12-15	REF	Corresponds to:	Ref document number: 98826 Country of ref document: AT Date of ref document: 19940115 Kind code of ref document: T
1994-01-27	REF	Corresponds to:	Ref document number: 58906431 Country of ref document: DE Date of ref document: 19940127
1994-03-10	ITF	It: translation for a ep patent filed	Owner name: STUDIO JAUMANN
1994-04-08	ET	Fr: translation filed
1994-04-13	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19940310
1994-09-13	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19940913 Ref country code: AT Effective date: 19940913
1994-09-14	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Effective date: 19940914
1994-09-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LI Effective date: 19940930 Ref country code: CH Effective date: 19940930
1994-10-20	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1994-10-20	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1994-11-18	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19941118 Year of fee payment: 6
1994-12-07	26N	No opposition filed
1995-01-31	EAL	Se: european patent in force in sweden	Ref document number: 89116977.3
1995-05-10	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19940913
1995-05-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Effective date: 19950531
1995-05-31	REG	Reference to a national code	Ref country code: CH Ref legal event code: PL
1995-06-12	EUG	Se: european patent has lapsed	Ref document number: 89116977.3
1995-07-28	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST
1996-06-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19960601
2005-09-13	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050913

Publication	Publication Date	Title
DE3243467C2 (de)	1986-02-20	Einrichtung zum Schutz eines Schalttransistors
EP0095579B1 (fr)	1986-09-17	Circuit de protection pour un transistor de commutation
DE2638178C2 (de)	1986-01-02	Schutzvorrichtung für integrierte Schaltungen gegen Überspannungen
DE102005022309B4 (de)	2012-06-14	Halbleitervorrichtung
DE3001632C2 (fr)	1988-02-04
DE4143674B4 (de)	2006-03-30	Schaltungsanordnung zur Steuerung des Nachlaufs eines Steuergeräts in einem Kraftfahrzeug
EP0123814A1 (fr)	1984-11-07	Circuit pour limiter le courant de démarrage
DE3687297T2 (de)	1993-04-15	Schaltung zum ableiten gespeicherter induktiver energie.
DE2907673A1 (de)	1980-01-03	Schaltungsanordnung zur ansteuerung eines bistabilen relais
DE4403375A1 (de)	1994-09-08	Einrichtung und Verfahren zum Steuern eines induktiven Verbrauchers
DE69220732T2 (de)	1998-01-08	Schutz von Halbleitern vor Transienten hoher Energie
EP0387729A2 (fr)	1990-09-19	Commande électronique d'un contacteur
EP0361212B1 (fr)	1993-12-15	Circuit de protection pour un transistor de commutation
DE3343201A1 (de)	1984-06-07	Ueberstrom-schutzschaltung fuer einen transistor
DE3150703C2 (de)	1985-07-04	Ansteuerschaltung für kurzschlußfeste Ausgabestufen
DE3430961A1 (de)	1986-02-27	Halbleiterschalter
DE10211099B4 (de)	2008-04-17	Vorrichtung zur Ansteuerung einer elektrischen Last
DE2726810C2 (de)	1981-09-17	Schaltungsanordnung, zur Kurzschlußbremsung eines Gleichstrommotors
EP0410188B1 (fr)	1994-11-02	Montage pour la protection d'un commutateur rythmé à semi-conducteur
DE2821085A1 (de)	1979-11-15	Zuendanlage fuer eine brennkraftmaschine
DE2854313B1 (de)	1979-12-06	UEberlastungsschutzanordnung fuer Schalttransistoren
EP0556209B1 (fr)	1995-10-04	Circuit pour la limitation de la tension de blocage sur un servomoteur
DE2640354A1 (de)	1977-03-17	Dynamische strombegrenzungsschaltung
DE2713310C3 (de)	1981-01-22	Schutzanordnung für eine Niederspannungs-Steuerschaltung
DE2526346C3 (de)	1983-02-10	Schaltungsanordnung zur Spannungsüberwachung für mehrere Gleichspannungen